clc
clear

k=1.380649*10^(-23);
B=10^6;
T=290;

R=10^5;
Vn=(4*k*T*B*R)
In=(4*k*T*B/R)

R_=1/(1/(10^5)+1/(5*10^4))
Vn=(4*k*T*B*R_)






